Re: Pietenpol-List: spar weight??

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Re: Pietenpol-List: spar weight??

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Original Posted By: K0BLR(at)webtv.net (Ben Ramler)
I am sure someone posted their finished wing spar weights here at sometime but I don't remember. I have built a set of plywood spars for 1 wingand am curious to know how much heavier they are than regular spars. My1x4 3/4 x 13' spar comes in at 15.3 lbs. It is built from two layers of 1/4" 3 ply Baltic birch to make the 1/2"thick web and has 4 fir cap strips 1" wide to build the I beam shape for atotal spar thickness of 1". The wing fittings areas have long fillerblocks of 1/4 ply. I have not yet load tested the spars and probably won'ttill spring. Was planning on testing to around 4 or 5 G. So if some of you could post your spar weights and type it would beappreciated. Wayne Sippola, Winnipeg (currently putting in cylinders on the '65 corvairengine)________________________________________________________________________________
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Re: Pietenpol-List: spar weight??

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Original Posted By: Christian Bobka
In asking about spar weights, Wayne Sippola noted:> My > 1x4 3/4 x 13' spar comes in at 15.3 lbs.> It is built from two layers of 1/4" 3 ply Baltic birch to make the 1/2"> thick web and has 4 fir cap strips 1" wide to build the I beam shape for a> total spar thickness of 1."Wayne, do you really mean Baltic birch? The stuff thatwoodworkers use for good cabinets, jigs, and otherstuff where ordinary plywood won't do? Equal layers,all from good wood, and without voids or too manypatches? The stuff you can buy, or at least special-order, at Home Depot? If so, you've got me worried.It's not waterproof, not even especially water-resistant.Probably for that reason, it has a reputation fordelaminating without obvious provocation. Great stuffin its place, but you probably don't want it in a load-bearing part of your plane.Owen Davies________________________________________________________________________________Date: Mon, 29 Jan 2001 22:42:10 -0500
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Re: Pietenpol-List: spar weight??

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Original Posted By:> Owen Davies
Owen, Yes, that is the wood I am talking about, but this is the first I've heardof it not being water resistant. I've left smaller pieces soaking in waterfor weeks without any apparent ill effects. Considering my whole fuselageis sheeted in the 1/8 inch version I do hope this is not a problem. GuessI'll do some more testing, and some more research. Anyone care to commenton this Baltic birch plywood?Wayne Sippola, Winnipeg----------
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Re: Pietenpol-List: spar weight??

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Original Posted By: Wayne Sippola
----- Original Message -----
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Re: Pietenpol-List: aluminum T.E.

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Original Posted By: "Mike Bell"
I need some advice.................I'm going to use aluminum T.E. and so far my attempts with the "flap" onthe back of the center section have yielded little dimples where the T.E. is flattenedto accept the back end of the rib and they are visible through the covering.No amount of coaxing, using pliers, pounding, or variations of those haseliminated the dimples. I hesitate to stop-drill and cut individual tabs ateach rib for fear of weakening the metal (hmm, how much stress does a trailingedge undergo, anyway?) plus it would take a lot of time. Anybody in our vast universe of wisdom have a solution for me or will I have tolearn to coexist with the dreaded dimples which proclaim to all the world thatI did not follow the plans.Thanks,Larry ps. The Great White Father has assigned me N 899 LW.Gom">http://explorer.msn.com________________________________________________________________________________Subject: Re: Pietenpol-List: aluminum T.E.
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Post by matronics »

Original Posted By: Steve Eldredge
02/02/2001 10:48:17 AMDimples?If you still have access to the face of the aluminum, clean itscrupulously and use a tiny bit of T-88 as "bondo" . Finish with alittle superfine sandpaper and I think that your dimples willdisappear.Mike________________________________________________________________________________
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RE: Pietenpol-List: aluminum T.E.

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Original Posted By: owner-pietenpol-list-server(at)matronics.com
Easy. Use wood. I've never seen it pucker or dimple.Steve E-----Original Message-----
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Pietenpol-List: aluminum T.E.

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Original Posted By: Michael D Cuy
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Re: Pietenpol-List: spar weight??

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Original Posted By: nle97(at)juno.com
>I need some advice.................I'm going to use aluminum T.E. and so far my attempts with the "flap" onthe back of the center section have yielded little dimples where the T.E.is flattenedto accept the back end of the rib and they are visible through the covering.Anybody in our vast universe of wisdom have a solution for me or will I have tolearn to coexist with the dreaded dimples which proclaim to all the world thatI did not follow the plans.Thanks,LarryI used preformed Al TE with very few problems. Are you forming the TE fromAl sheet?I suggest, if you use wood, to place seaplane fittings at each bay.Mike B Piet N687MB ( Mr Sam )________________________________________________________________________________Date: Fri, 2 Feb 2001 12:27:58 -0600Subject: Re: Pietenpol-List: spar weight??
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Re: Pietenpol-List: spar weight??

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Original Posted By: "Michael Brusilow"
Along the same lines, I have been wondering myself if there are any other solutions to reducing long-term moisture damage. Specifically, I wanted to pose the following question........Since weight considerations would not allow a person to encapsulate the entire wooden craft with epoxy, what about something like Thompsons water seal or cuprinol? The former contains various waxes that are in some volatile carrier and the latter contains various compounds that would actually prevent rot. I AM NOT RECOMMENDING THIS TO ANYONE merely throwing the possibility out there for comment/or immediate scolding or spanking on the wrist. My brother has a masters from Georgetown University in chemistry and said that such treatment should not affect epoxy glues. Another question would be : "How would this affect the ability to attach covering material?"For that matter, why not pressure treat the entire wooden structure? Would someone volunteer to put a completed fuselage or wing into a wood treatment pressure vessel? Anyone?......or paint that green cuprinol wood preservative on everything. I think that weight gain after the volatile solvent has evaporated would be negligible. Then you could fly the thing to Costa-Rica and use the rainforest as your hanger.Allen SmithFairhope, Alabamaallenfarleysmith(at)hotmail.comasmith(at)egovehicles.comPietenpol in progressin response to:No matter whether its wood, aluminum, or>steel, rot, corrosion or rust will eventually set in and it just takes>proper maintenance to correct and keep it going.>>John Langston>Pipe Creek, TX>nle97(at)juno.com>>________________________________________________________________________________
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Re: Pietenpol-List: spar weight??

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Original Posted By: nle97(at)juno.com
To the list,One of my neighbors, and good friend told me about this list. Pete, isbuilding a Pietenpol, knowing him it will be fabulous. About myself; my wife, Yoshie and I live in Hilger Montana. We ownBlue Sky Aviation Fabric & Repair. BSA has three divisions, R&D,Marine, and Aircraft. We are distributors and tech-support for theAircraft Finishing Systems waterborne cover and paint system. Otherdistributor ships include the 2 =BC" round Micro Air 760 radios, GroveLanding gear, and a line of high performance hose, and -AN fittings. BSA is also the builder assistance center for SkyStar aircraft, Kitfox. On top of that we also have a very extensive line after market parts andenhancements for the Avid and Kitfox. Please visit our website www.blskyav.com.Noel and Yoshie SimmonsBlue Sky Aviation Fabric & Repair"We do builder assistance!"PH# 406-538-6574blueskyaviation(at)mcn.netwww.blskyav.com________________________________________________________________________________Date: Sat, 3 Feb 2001 11:14:33 -0600Subject: Re: Pietenpol-List: spar weight??
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Post by matronics »

Original Posted By: Joe
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> Re: Pietenpol-List: spar weight??

Post by matronics »

Original Posted By: "John McNarry"
> > > In asking about spar weights, Wayne Sippola noted:> > > My > 1x4 3/4 x 13' spar comes in at 15.3 lbs.> > It is built from two layers of 1/4" 3 ply Baltic birch to make the 1/2"> > thick web and has 4 fir cap strips 1" wide to build the I beam shapefor a> > total spar thickness of 1."> > Wayne, do you really mean Baltic birch? The stuff that> woodworkers use for good cabinets, jigs, and other> stuff where ordinary plywood won't do? Equal layers,> all from good wood, and without voids or too many> patches? The stuff you can buy, or at least special-> order, at Home Depot? If so, you've got me worried.> It's not waterproof, not even especially water-resistant.> Probably for that reason, it has a reputation for> delaminating without obvious provocation. Great stuff> in its place, but you probably don't want it in a load-> bearing part of your plane.> > Owen Davies> > > > > ________________________________________________________________________________
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> > Re: Pietenpol-List: spar weight??

Post by matronics »

Original Posted By: "Larry Williams"
> > > Davies" > > > > In asking about spar weights, Wayne Sippola noted:> > > > > My > 1x4 3/4 x 13' spar comes in at 15.3 lbs.> > > It is built from two layers of 1/4" 3 ply Baltic> birch to make the 1/2"> > > thick web and has 4 fir cap strips 1" wide to> build the I beam shape> for a> > > total spar thickness of 1."> > > > Wayne, do you really mean Baltic birch? The stuff> that> > woodworkers use for good cabinets, jigs, and other> > stuff where ordinary plywood won't do? Equal> layers,> > all from good wood, and without voids or too many> > patches? The stuff you can buy, or at least> special-> > order, at Home Depot? If so, you've got me> worried.> > It's not waterproof, not even especially> water-resistant.> > Probably for that reason, it has a reputation for> > delaminating without obvious provocation. Great> stuff> > in its place, but you probably don't want it in a> load-> > bearing part of your plane.> > > > Owen Davies> > > > > > > > > > > > >> through>> http://www.matronics.com/archives> http://www.matronics.com/emaillists>> Matronics!>> > > > Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/________ ... __________
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> Re: Pietenpol-List: spar weight??

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Original Posted By: "Yoshie Simmons"
> Hi Wayne> Test some to destruction, wet and dry, in as many tortured ways asyou> can imagine the airframe could stress the wood> and if the results give you peace of mind.......> Our fairly dry climate shouldn't be a factor, if the whole wooden> structure is well varnished before covering.> I have wood stored here that is consistantly at 7 to 12% moisturecontent.> Winnipeg can't be that much wetter than Brandon.> John> > P.S. Are you going on the RAA Wpg. Hanger tour Feb 24?> > > > > ________________________________________________________________________________
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>> TRIBUTE FROM AN INDIVIDUAL IN CANADA

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Original Posted By: "walter evans"
>>>>>>>>>>>>>>>> THIS IS A FIRST! I THOUGHT I SHOULD PASS THIS ON.>> JoeC 99621>>>> > > > TRIBUTE TO THE UNITED STATES>> > > >>> > > >>> > > > This, from a Canadian newspaper, is worth sharing.>> > > >>> > > >>> > > > America: The Good Neighbor.>> > > >>> > > > Widespread but only partial news coverage was given>> > > > recently to a remarkable editorial broadcast from>> > > > Toronto by Gordon Sinclair, a Canadian television>> > > > commentator. What follows is the full text of his>> > > > trenchant remarks as printed in the Congressional>> > > > Record:>> > > >>> > > >>> > > > "This Canadian thinks it is time to speak up for the>> > > > Americans as the most generous and possibly the least>> > > > appreciated people on all the earth.>> > > >>> > > > Germany, Japan and, to a lesser extent, Britain and>> > > > Italy were lifted out of the debris of war by the>> > > > Americans who poured in billions of dollars and>> > > > forgave other billions in debts. None of these>> > > > countries is today paying even the interest on its>> > > > remaining debts to the United States.>> > > >>> > > > When France was in danger of collapsing in 1956,>> > > > it was the Americans who propped it up, and their>> > > > reward was to be insulted and swindled on the streets>> > > > of Paris. I was there. I saw it.>> > > >>> > > > When earthquakes hit distant cities, it is the>> > > > United States that hurries in to help. This spring, 59>> > > > American communities were flattened by tornadoes.>> > > > Nobody helped.>> > > >>> > > > The Marshall Plan and the Truman Policy pumped>> > > > billions of dollars into discouraged countries. Now>> > > > newspapers in those countries are writing about the>> > > > decadent, warmongering Americans.>> > > >>> > > > I'd like to see just one of those countries that>> > > > is gloating over the erosion of the United States>> > > > dollar build its own airplane. Does any other country>> > > > in the world have a plane to equal the Boeing Jumbo>> > > > Jet, the Lockheed Tri-Star, or the Douglas DC10?>> > > > If so, why don't they fly them? Why do all the>> > > > International lines except Russia fly American Planes?>> > > >>> > > > Why does no other land on earth even consider putting>> > > > a man or woman on the moon? You talk about Japanese>> > > > technocracy, and you get radios. You talk about German>> > > > technocracy, and you get automobiles.>> > > > You talk about American technocracy, and you find>> > > > men on the moon - not once, but several times ->> > > > and safely home again.>> > > >>> > > > You talk about scandals, and the Americans put theirs>> > > > right in the store window for everybody to look at .>> > > > Even their draft-dodgers are not pursued and hounded.>> > > > They are here on our streets, and most of them, unless>> > > > they are breaking Canadian laws, are getting American>> > > > dollars from ma and pa at home to spend here.>> > > >>> > > > When the railways of France, Germany and India>> > > > were breaking down through age, it was the Americans>> > > > who rebuilt them. When the Pennsylvania Railroad and>> > > > the New York Central went broke, nobody loaned them an>> > > > old caboose. Both are still broke.>> > > >>> > > > I can name you 5000 times when the Americans raced>> > > > to the help of other people in trouble. Can you name>> > > > me even one time when someone else raced to the>> > > > Americans in trouble? I don't think there was outside>> > > > help even during the San Francisco earthquake.>> > > >>> > > > Our neighbors have faced it alone, and I'm one>> > > > Canadian who is damned tired of hearing them get>> > > > kicked around. They will come out of this thing with>> > > > their flag high. And when they do, they are entitled>> > > > to thumb their nose at the lands that are gloating>> > > > over their present troubles. I hope Canada is not one of>> > > > those.">> > > >>> > > >>> > > >>> > > > Stand proud, America!>> > > >>>>> > > > Wear it proudly!!>> > > >>> > > > This is one of the best editorials that I have ever>> > > > read regarding the United States. It is nice that>> > > > one man realizes it. I only wish that the rest of the>> > > > world would realize it. We are always blamed for>> > > > everything, and never even get a thank you for the>> > > > things we do.>>________________________________________________________________________________
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> Re: Pietenpol-List: spar weight??

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Original Posted By: "Larry Williams"
> Hi Wayne> Test some to destruction, wet and dry, in as many tortured waysasyou> can imagine the airframe could stress the wood> and if the results give you peace of mind.......> Our fairly dry climate shouldn't be a factor, if the wholewooden> structure is well varnished before covering.> I have wood stored here that is consistantly at 7 to 12% moisturecontent.> Winnipeg can't be that much wetter than Brandon.> John>> P.S. Are you going on the RAA Wpg. Hanger tour Feb 24?>>________________________________________________________________________________
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